157157513 has 2 divisors, whose sum is σ = 157157514. Its totient is φ = 157157512.

The previous prime is 157157489. The next prime is 157157549. The reversal of 157157513 is 315751751.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 132526144 + 24631369 = 11512^2 + 4963^2 .

It is a cyclic number.

It is not a de Polignac number, because 157157513 - 2⁸ = 157157257 is a prime.

It is not a weakly prime, because it can be changed into another prime (157157563) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78578756 + 78578757.

It is an arithmetic number, because the mean of its divisors is an integer number (78578757).

Almost surely, 2^157157513 is an apocalyptic number.

It is an amenable number.

157157513 is a deficient number, since it is larger than the sum of its proper divisors (1).

157157513 is an equidigital number, since it uses as much as digits as its factorization.

157157513 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18375, while the sum is 35.

The square root of 157157513 is about 12536.2479634060. The cubic root of 157157513 is about 539.6494215095.

The spelling of 157157513 in words is "one hundred fifty-seven million, one hundred fifty-seven thousand, five hundred thirteen".